<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body style="color: red">
<h2 style="color: cornflowerblue" id="nig">我是框架一</h2>
</body>
<script>
    pigJZH = document.getElementById('nig')
    o.style.color = 'pink'
</script>
</html>
